WO2012001185A1 - Wrapping machine - Google Patents

Wrapping machine Download PDF

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Publication number
WO2012001185A1
WO2012001185A1 PCT/ES2011/000215 ES2011000215W WO2012001185A1 WO 2012001185 A1 WO2012001185 A1 WO 2012001185A1 ES 2011000215 W ES2011000215 W ES 2011000215W WO 2012001185 A1 WO2012001185 A1 WO 2012001185A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
rollers
roller
continuous film
engradadora
Prior art date
Application number
PCT/ES2011/000215
Other languages
Spanish (es)
French (fr)
Inventor
David Canals Guimera
Original Assignee
Control D'embalatges, S.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from ES201030685U external-priority patent/ES1072929Y/en
Priority claimed from ES201130367A external-priority patent/ES2362846B1/en
Application filed by Control D'embalatges, S.L. filed Critical Control D'embalatges, S.L.
Priority to EP11800213.8A priority Critical patent/EP2589540A4/en
Publication of WO2012001185A1 publication Critical patent/WO2012001185A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/006—Helical strip wrapping combined with roping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/02—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders
    • B65B11/025—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders by webs revolving around stationary articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
    • B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
    • B65B61/08—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting using rotary cutters

Definitions

  • the present invention relates to a baler of the type used for the placement of a plastic film around loads of goods, in order to compact and hold them together.
  • This invention is applicable in the industry of packaging goods for transport, and more specifically in the sector of manufacturing machines for packaging goods on pallets, by wrapping.
  • wrappers generally comprise a structure provided with a continuous film dispenser around the palletized merchandise to be wrapped.
  • the rotation of the dispenser around the pallet to be wrapped, or the rotation of the pallet on itself occurs while the dispenser remains at a certain point on the periphery.
  • the aforementioned dispenser is vertically movable on the structure to be able to apply the plastic film around the pallet and along its entire height.
  • the dispenser generally comprises: - a bobbin holder for placing the reel of film to be dispensed, - a set of rollers for drawing the plastic film and - at least one exit roller of the film.
  • these balers additionally comprise automatic film cutting means and clamps for holding the cut film.
  • balers therefore have means for the supply of the plastic film from the coil placed in the bobbin holder.
  • Macroperforated plastic film It consists of a plastic film that presents a series of windows, forming parallel alignments along the film, alternating with longitudinal reinforcements that improve the mechanical properties of the film.
  • the windows of the macroperforated film avoid the problems of perspiration, ventilation and condensation of the continuous film, so the macroperforated film is especially suitable for wrapping boxes of fruits, vegetables and natural products in general.
  • the wrapping machine object of this invention presents some technical peculiarities intended to facilitate the work of wrapping with macroperforated film by preparing said film in the same wrapping machine from conventional continuous film reels, reducing packaging costs and improving the reliability of operation. .
  • the wrapping machine of the invention is of the type comprising a structure with a film dispenser that allows relative rotation with respect to the pallet to be wrapped and with vertical displacement with respect to the structure; said dispenser comprising, a bobbin holder for the positioning of a reel of continuous plastic film, a set of rollers for drawing the film to be supplied and at least one exit roller of the film.
  • the wrapping machine comprises: cutting rollers for the definition, in the continuous film from the coil, of some windows and the transformation of said continuous film into a macroperforated film before its application on the load to be packed.
  • Said set of cutting rollers is configured by a roller carrying radial cutting blades, arranged in parallel planes, and by a facing roller, between which the continuous plastic film passes.
  • the wrapping machine comprises an additional bobbin holder carrying at least one film reel for the supply of reinforcing film strips, and means for the lateral concentration of each of the reinforcing film strips and the formation of respective cords. These cords are intended to be applied in parallel and in a longitudinal direction on one of the faces of the continuous film so that said cords are positioned between the windows of the macroperforated film.
  • the realization of the macroperforated film at the time of wrapping improves the quality of said macroperforated film as it does not have to be wound for storage, transport and unwinding for use.
  • the reinforced sheet or film has improved mechanical performance as the film is continuous, and the cords are stretched; which requires less material to pack an object or merchandise.
  • the additional bobbin holder presents the reinforcing film strips in a plurality of independent coils arranged in parallel.
  • the reinforcing film strips are supplied simultaneously already pre-cut.
  • the supply of the reinforcing strips comprises a continuous film coil in the additional bobbin holder, and cutting means, arranged between the additional bobbin holder and the lateral concentration means, for cutting the continuous film of said reel in strips of reinforcing film before passing through the lateral concentration means.
  • said plastic film has adhesive on the coupling face of said cords, for example.
  • the lateral concentration means are formed by a comb that produces a concentration of the film strips of reinforcement when approaching strangulations defined in the comb, causing the conformation of the reinforcement film cords.
  • the roller blades corresponding to the cutting roller set are heated blades and the counter roll has a heat-resistant coating, so that the macroperforated windows are quickly made by contact and fusion of the continuous film with said blades, without forming tears.
  • these blades comprise a nicrom heating wire
  • the carrier roller has a reinforced fiberglass coating in the areas not occupied by said blades. These blades are heated to an approximate temperature between 50 and 120 degrees Celsius.
  • the counter roll has a heat-resistant coating on the outside, for example a silicone sheath, which ensures the correct cutting of the continuous plastic film by resisting temperatures up to 200 degrees Celsius.
  • the set of cutting rollers is arranged before the set of stretching rollers, so that the macroperforated windows are made in said stretching of the macroperforated film, taking its oval shape.
  • the set of cutting rollers is arranged after the set of stretching rollers.
  • the concentration means are composed of a rotating roller, provided with perimeter throats of "V" section, for the passage and concentration of the film strips of reinforcement.
  • the perimeter throats of the concentration roller have a "V" section, acquiring a spatial shape of diabolo or two trunks of cones opposed by their smaller bases.
  • the strips of reinforcement film pass through these throats more smoothly, without the risk of snagging or rubbing that could damage it, thus improving the conditions of supply speed of the reinforcement cords.
  • the stretching rollers are provided with motorization and arranged in a sequential order, for the passage of the continuous film reinforced with the cords, rotating the outer surface of the second stretching roller, a tangential speed greater than that of the first roller of stretched, causing the stretch of the continuous film sheet, with the reinforcement cords.
  • an increase in resistance and the bonding of the cords to the continuous film by elongation is obtained.
  • the continuous film enters the stretching rollers with the macroperforated windows cut, these windows are lengthened with the material, acquiring their longitudinally elongated oval shape.
  • This motorization or relative movement between both rollers can be carried out with various solutions, such as for example a motor that drives a gear associated with the two rollers to move them with different speeds.
  • the stretching roller is motorized and the other stretching roller comprises a brake or a motor that forces it to rotate at a lower speed.
  • the stretching rollers are arranged alternately on both sides of the passage of the continuous film and of the reinforcement cords in their stretching. In this way a better adhesion of the cords to the continuous film is achieved.
  • FIG. 1 shows a plan view of the baler with the set of cutting rollers in a position prior to the set of drawing rollers.
  • FIG. 2 shows a plan view of the baler with the set of cutting rollers in a position after the set of drawing rollers.
  • FIG. 3 shows a partial perspective detail of the conformation of the reinforcements and their attachment to the continuous film when passing through concentration means, in this case a comb.
  • FIG. 4 shows a partial perspective detail of the conformation of the macroperforated windows and the passage of the continuous film through the drawing rollers to finally obtain the macroperforated film.
  • FIG. 5 shows an elevation view of the longitudinal sequence of the circulation of the continuous film and the cords, observing how the strips of reinforcing film come from independent coils on the additional bobbin case.
  • FIG. 6 an elevation view of the longitudinal sequence of an alternative embodiment of the circulation of the continuous film and the cords, observing how the strips of reinforcing film are obtained from a continuous film and coil that passes through a means of cutting and separating said strips of reinforcing film in situ.
  • the wrapper object of this invention comprises, in a first embodiment, a rotating platform (14) for placing the pallet (P) to be encased, and a lateral structure (1) with a column (15). ) on which a dispenser (2) for dispensing a macroperforated wrapping film (42) is located, said dispenser (2) being able to move up and down on said column (15) of the structure (1).
  • Attached to the structure (1) is an electrical control and instrumentation panel (16) that handles the entire baler.
  • the dispenser (2) comprises a bobbin holder (3) of a continuous plastic film (4), next to which is an additional bobbin holder (8) of reinforcing film (9), which in figure 3, is wound in several independent coils (92) arranged parallel on said additional bobbin holder (8).
  • the additional bobbin holder (8) comprises a continuous film reel (93) that faces cutting means (10) for forming the reinforcing film strips (9 ) before going through the concentration means that form the cords (91).
  • This comb (11) is made in this case in nylon, with wide entrances towards a strangulation of the cord (91).
  • the dispenser (2) has a set of cutting rollers in which the continuous film (4) with the reinforcing cords (91) enters.
  • This set of cutting rollers comprises a carrier roller (71) of longitudinal cutting blades (72) for heating and a counter roller (73) faced, between which passes the continuous film (4) of plastic.
  • Both rollers (71 and 73) comprise a mechanism that rotates them in the direction of advance of the continuous plastic film (4) in a synchronized manner.
  • These blades (72) are arranged longitudinally for the formation of windows (41) in the continuous film (4), and separated by spaces corresponding to the passage areas of the cords (91) of the reinforcing film strips ( 9), which are not cut.
  • the dispenser (2) presents a set of stretching rollers (51 and 52), which rotate at different speeds to produce a stretch of the macroperforated film (42) for application on the pallet (P) and the widening of the windows (41) from macroperforated to its oval shape.
  • the dispenser (2) has an exit roller (6) of the macroperforated film (42) during handling.
  • FIG 5 an embodiment of the wrapping machine is shown, which first shows the set of stretch rollers (51, 52) and then the set of cutting rollers in the course of the continuous film (4).
  • the means for placing the cords (91) on the continuous film (4) comprise the additional bobbin holder (8) and a plurality of independent coils (92) of reinforcing film strips (9), arranged parallel, to attack the concentration means, which in this case are configured by a rotating concentrator roller (12), where the strips of reinforcing film (9) become cords (91).
  • This rotating concentrator roller (12) rotates freely and has perimeter throats (13) of "V" section for the concentration of respective strips of reinforcing film (9) to cords (91).
  • This pair of stretch rollers (51, 52) comprises a motorization that allows the tangential speed of the surface of the second roller (52) to be greater than the tangential speed of the first roller (51) to produce stretching of the continuous film (4 ) and of the cords (91) applied on its surface, producing its adhesion, improving its resistance and optimizing its use by general elongation.
  • Intermediate rollers (61) for diverting the macroperforated film (42) are located at the entrance and exit of the stretching roller pair (51, 52).

Abstract

The invention relates to a wrapping machine comprising: a structure (1) including a film dispenser (2) which can rotate in relation to the pallet to be wrapped and which can move vertically in relation to the structure (1), said dispenser including a reel holder (3) for the positioning of a reel of continuous plastic film (4), a set of drawing rollers (51, 52), and outfeed rollers (6); and cutting rollers for defining holes (41) in the continuous film (4) and transforming said continuous film (4) into a macroperforated film (42) prior to the application thereof to the load to be wrapped. The set of cutting rollers is formed by a roller (71) bearing radial cutting blades (72) disposed in parallel planes and by an opposing counter-roller (73), between which rollers the continuous plastic film (4) passes.

Description

DESCRIPCIÓN  DESCRIPTION
ENFARDADORA.  ENFARDADORA.
Objeto de la invención  Object of the invention
La presente invención se refiere a una enfardadora del tipo de las empleadas para la colocación de un film plástico alrededor de cargas de mercancías, con el fin de compactarlas y mantenerlas unidas.  The present invention relates to a baler of the type used for the placement of a plastic film around loads of goods, in order to compact and hold them together.
Campo de aplicación de la invención. Field of application of the invention.
Esta invención es aplicable en la industria del empaquetado de mercancías para su transporte, y más concretamente el sector de la fabricación de máquinas para empaquetado de mercancías en palets, mediante enfardado.  This invention is applicable in the industry of packaging goods for transport, and more specifically in the sector of manufacturing machines for packaging goods on pallets, by wrapping.
Antecedentes de la invención. Background of the invention.
En la actualidad es muy común el uso de film de plástico para el enfardado de palets de mercancías mediante la utilización de enfardadoras.  Nowadays it is very common to use plastic film for wrapping pallets of goods by using balers.
Estas enfardadoras comprenden de forma generalizada una estructura provista de un dispensador de film en continuo alrededor de la mercancía paletizada a envolver. En función del tipo de enfardadora, se produce bien el giro del dispensador alrededor del palet a envolver, o bien el giro del palet sobre sí mismo, permaneciendo el dispensador en punto determinado de la periferia.  These wrappers generally comprise a structure provided with a continuous film dispenser around the palletized merchandise to be wrapped. Depending on the type of wrapping machine, the rotation of the dispenser around the pallet to be wrapped, or the rotation of the pallet on itself, occurs while the dispenser remains at a certain point on the periphery.
En cualquier caso el mencionado dispensador es desplazable verticalmente sobre la estructura para poder aplicar el film de plástico alrededor del palet y en toda la altura del mismo.  In any case, the aforementioned dispenser is vertically movable on the structure to be able to apply the plastic film around the pallet and along its entire height.
El dispensador comprende un generalmente: - un portabobinas para la colocación de la bobina de film a dispensar, - un juego de rodillos de estirado del film de plástico y - al menos un rodillo de salida del film. En algunos casos estas enfardadoras comprenden adicionalmente unos medios de corte automático del film y unas pinzas de sujeción del film cortado.  The dispenser generally comprises: - a bobbin holder for placing the reel of film to be dispensed, - a set of rollers for drawing the plastic film and - at least one exit roller of the film. In some cases, these balers additionally comprise automatic film cutting means and clamps for holding the cut film.
Estas enfardadoras disponen por tanto de medios para el suministro del film plástico procedente de la bobina colocada en el portabobinas.  These balers therefore have means for the supply of the plastic film from the coil placed in the bobbin holder.
Actualmente existen en el mercado bobinas de diferentes tipos de film plástico, aplicables en enfardadoras, siendo de destacar los siguientes tipos de film plástico: - Film continuo. Es el más económico y fácil de colocar; sin embargo impide la transpiración y ventilación de las mercancías enfardadas con este tipo de film; también plantea problemas de condensación de agua en su interior con la consiguiente humectación de las mercancías enfardadas. Por tanto su uso está limitado al enfardado de mercancías que no se ven afectadas por los inconvenientes mencionados de transpiración y humedad. Currently there are reels of different types of plastic film on the market, applicable in balers, the following types of plastic film being noteworthy: - Continuous film. It is the most economical and easy to place; nevertheless it prevents the perspiration and ventilation of the merchandise encased with this type of film; It also poses problems of condensation of water inside with the consequent wetting of the wrapped goods. Therefore its use is limited to the bundling of goods that are not affected by the aforementioned problems of perspiration and moisture.
- Film plástico macroperforado. Consiste en un film de plástico que presenta una serie de ventanas, formando a lo largo del film unas alineaciones paralelas, alternadas con unos refuerzos longitudinales que mejoran las propiedades mecánicas del film. Las ventanas del film macroperforado evitan los problemas de transpiración, ventilación y condensación del film continuo, por lo que el film macroperforado resulta especialmente indicado para el enfardado de cajas de frutas, verduras y productos naturales en general.  - Macroperforated plastic film. It consists of a plastic film that presents a series of windows, forming parallel alignments along the film, alternating with longitudinal reinforcements that improve the mechanical properties of the film. The windows of the macroperforated film avoid the problems of perspiration, ventilation and condensation of the continuous film, so the macroperforated film is especially suitable for wrapping boxes of fruits, vegetables and natural products in general.
Un problema importante de las bobinas de film plástico macroperforado es que son irregulares debido a la superposición desigual de ventanas y refuerzos, con lo que la dispensación es compleja y propensa a producir atascos e interrupciones en el funcionamiento de la enfardadora. No obstante un problema especialmente importante de las bobinas de film macroperforado es su elevado coste en relación con las bobinas de film continuo.  An important problem of the coils of macroperforated plastic film is that they are irregular due to the uneven overlapping of windows and reinforcements, so that the dispensing is complex and prone to jamming and interruptions in the operation of the baler. However, a particularly important problem of macroperforated film reels is their high cost in relation to continuous film reels.
Descripción de la invención Description of the invention
La enfardadora objeto de esta invención, presenta unas particularidades técnicas destinadas a facilitar la labor de enfardado con film macroperforado mediante la elaboración de dicho film en la misma enfardadora a partir de bobinas de film continuo convencional, reduciendo costes de empaquetado y mejorando la fiabilidad de funcionamiento.  The wrapping machine object of this invention, presents some technical peculiarities intended to facilitate the work of wrapping with macroperforated film by preparing said film in the same wrapping machine from conventional continuous film reels, reducing packaging costs and improving the reliability of operation. .
La enfardadora de la invención, es del tipo de las que comprenden una estructura con un dispensador de film posibilitado de giro relativo respecto al palet a enfardar y de desplazamiento vertical respecto a la estructura; comprendiendo dicho dispensador, un portabobinas para el posicionamiento de una bobina de film continuo de plástico, un juego de rodillos de estirado del film a suministrar y al menos un rodillo de salida del film.  The wrapping machine of the invention is of the type comprising a structure with a film dispenser that allows relative rotation with respect to the pallet to be wrapped and with vertical displacement with respect to the structure; said dispenser comprising, a bobbin holder for the positioning of a reel of continuous plastic film, a set of rollers for drawing the film to be supplied and at least one exit roller of the film.
De acuerdo con la invención, la enfardadora comprende: unos rodillos de corte para la definición, en el film continuo procedente de la bobina, de unas ventanas y la transformación de dicho film continuo en un film macroperforado antes de su aplicación sobre la carga a enfardar. Dicho juego de rodillos de corte está configurado por un rodillo portador de unas cuchillas radiales de corte, dispuestas en planos paralelos, y por un contrarrodillo enfrentado, entre los cuales pasa el film continuo de plástico. According to the invention, the wrapping machine comprises: cutting rollers for the definition, in the continuous film from the coil, of some windows and the transformation of said continuous film into a macroperforated film before its application on the load to be packed. Said set of cutting rollers is configured by a roller carrying radial cutting blades, arranged in parallel planes, and by a facing roller, between which the continuous plastic film passes.
La enfardadora comprende un portabobinas adicional portador de al menos una bobina de film para el suministro de tiras de film de refuerzo, y unos medios para la concentración lateral de cada una de las tiras del film de refuerzo y la conformación de respectivos cordones. Estos cordones están destinados a aplicarse paralelamente y en dirección longitudinal sobre una de las caras del film continuo de modo que dichos cordones queden posicionados entre las ventanas del film macroperforado.  The wrapping machine comprises an additional bobbin holder carrying at least one film reel for the supply of reinforcing film strips, and means for the lateral concentration of each of the reinforcing film strips and the formation of respective cords. These cords are intended to be applied in parallel and in a longitudinal direction on one of the faces of the continuous film so that said cords are positioned between the windows of the macroperforated film.
La realización del film de macroperforado en el momento del enfardado mejora la calidad de dicho film macroperforado al no tenerse que bobinar para su almacenamiento, transportarlo y desbobinarlo para su uso.  The realization of the macroperforated film at the time of wrapping improves the quality of said macroperforated film as it does not have to be wound for storage, transport and unwinding for use.
A su vez, la lámina o film reforzado presenta mejoradas sus prestaciones mecánicas al estar el film continuo, y los cordones, estirados; con lo que se requiere menos material para embalar un objeto o mercancía.  In turn, the reinforced sheet or film has improved mechanical performance as the film is continuous, and the cords are stretched; which requires less material to pack an object or merchandise.
En una realización, el portabobinas adicional presenta las tiras de film de refuerzo en una pluralidad de bobinas independientes dispuestas en paralelo. Así las tiras de film de refuerzo se suministran simultáneamente ya precortadas.  In one embodiment, the additional bobbin holder presents the reinforcing film strips in a plurality of independent coils arranged in parallel. Thus the reinforcing film strips are supplied simultaneously already pre-cut.
En una realización, el suministro de las tiras de refuerzo comprende una bobina de film continuo en el portabobinas adicional, y unos medios de corte, dispuestos entre el portabobinas adicional y los medios de concentración lateral, para el corte del film continuo de dicha bobina en tiras de film de refuerzo antes de su paso por los medios de concentración de lateral. Esta configuración posibilita que el "stock" o almacenamiento de bobinas de film sea reducido, ya que las bobinas de film continuo pueden también servir para realizar las tiras de film de refuerzo en el mismo momento de la elaboración del film macroperforado.  In one embodiment, the supply of the reinforcing strips comprises a continuous film coil in the additional bobbin holder, and cutting means, arranged between the additional bobbin holder and the lateral concentration means, for cutting the continuous film of said reel in strips of reinforcing film before passing through the lateral concentration means. This configuration allows the "stock" or storage of film reels to be reduced, since the continuous film reels can also be used to make the reinforcing film strips at the same time as the macroperforated film is made.
Para mejorar la adhesión de los cordones de film de refuerzo al film plástico, se ha previsto que en una realización dicho film plástico presente adhesivo en la cara de acoplamiento de dichos cordones, por ejemplo.  In order to improve the adhesion of the reinforcing film cords to the plastic film, it is provided that in one embodiment said plastic film has adhesive on the coupling face of said cords, for example.
En una realización, los medios de concentración lateral están conformados por un peine que produce una concentración de las tiras de film de refuerzo al acercarse a unos estrangulamientos definidos en el peine, provocando la conformación de los cordones de film de refuerzo. In one embodiment, the lateral concentration means are formed by a comb that produces a concentration of the film strips of reinforcement when approaching strangulations defined in the comb, causing the conformation of the reinforcement film cords.
En una realización de la invención, las cuchillas del rodillo correspondiente al juego de rodillos de corte son cuchillas calefactadas y el contrarrodillo presenta un recubrimiento resistente al calor, de forma que las ventanas de macroperforado se realizan rápidamente por el contacto y fusión del film continuo con dichas cuchillas, sin formar desgarros.  In one embodiment of the invention, the roller blades corresponding to the cutting roller set are heated blades and the counter roll has a heat-resistant coating, so that the macroperforated windows are quickly made by contact and fusion of the continuous film with said blades, without forming tears.
En un ejemplo de realización, estas cuchillas comprenden un hilo calefactor de nicrom, y el rodillo portador presenta un recubrimiento de fibra de vidrio reforzado en las zonas no ocupadas por dichas cuchillas. Estas cuchillas se calientan a una temperatura aproximada entre 50 y 120 grados centígrados. A su vez, el contrarrodillo presenta exteriormente un recubrimiento resistente al calor, que por ejemplo es una funda de silicona, que asegura el corte correcto del film continuo de plástico al resistir temperaturas hasta 200 grados centígrados.  In an exemplary embodiment, these blades comprise a nicrom heating wire, and the carrier roller has a reinforced fiberglass coating in the areas not occupied by said blades. These blades are heated to an approximate temperature between 50 and 120 degrees Celsius. In turn, the counter roll has a heat-resistant coating on the outside, for example a silicone sheath, which ensures the correct cutting of the continuous plastic film by resisting temperatures up to 200 degrees Celsius.
En una realización preferente, el juego de rodillos de corte está dispuesto antes del juego de rodillos de estirado, de forma que las ventanas del macroperforado se efectúan en dicho estirado del film macroperforado, tomando su forma ovalada.  In a preferred embodiment, the set of cutting rollers is arranged before the set of stretching rollers, so that the macroperforated windows are made in said stretching of the macroperforated film, taking its oval shape.
También se ha previsto, en una alternativa de realización, que el juego de rodillos de corte está dispuesto después del juego de rodillos de estirado.  It is also provided, in an alternative embodiment, that the set of cutting rollers is arranged after the set of stretching rollers.
En una realización, destinada a posibilitar una mayor velocidad de elaboración del film macroperforado, los medios de concentración están compuestos por un rodillo giratorio, dotado con unas gargantas perimetrales de sección en "V", para el paso y concentración de las tiras de film de refuerzo. Las gargantas perimetrales del rodillo de concentración presentan una sección en "V", adquiriendo una forma espacial de diábolo o dos troncos de conos opuestos por sus bases menores.  In one embodiment, intended to enable a faster processing speed of the macroperforated film, the concentration means are composed of a rotating roller, provided with perimeter throats of "V" section, for the passage and concentration of the film strips of reinforcement. The perimeter throats of the concentration roller have a "V" section, acquiring a spatial shape of diabolo or two trunks of cones opposed by their smaller bases.
Las tiras de film de refuerzo pasan por dichas gargantas con mayor suavidad, sin riesgo de enganchones ni roces que pudieran deteriorarlo, mejorando así las condiciones de velocidad de suministro de los cordones de refuerzo.  The strips of reinforcement film pass through these throats more smoothly, without the risk of snagging or rubbing that could damage it, thus improving the conditions of supply speed of the reinforcement cords.
En una realización, los rodillos de estirado, están dotados de motorización y dispuestos en orden consecutivo, para el paso del film continuo reforzado con los cordones, girando la superficie exterior del segundo rodillo de estirado, una velocidad tangencial mayor que la del primer rodillo de estirado, provocando el estiramiento de la lámina de film continuo, con los cordones de refuerzo. Así, se obtiene un aumento de resistencia y la unión de los cordones al film continuo por alargamiento. En caso de que el film continuo entre en los rodillos de estirado con las ventanas de macroperforado cortadas, estas ventanas se alargan con el material, adquiriendo su forma ovalada alargada longitudinalmente. Esta motorización o movimiento relativo entre ambos rodillos se puede realizar con diversas soluciones, tal como por ejemplo un motor que acciona un engranaje asociado a los dos rodillos para moverlos con diferentes velocidades. En otra realización, el rodillo de estirado se encuentra motorizado y el otro rodillo de estirado comprende un freno o un motor que lo obliga a girar a una velocidad más reducida. In one embodiment, the stretching rollers are provided with motorization and arranged in a sequential order, for the passage of the continuous film reinforced with the cords, rotating the outer surface of the second stretching roller, a tangential speed greater than that of the first roller of stretched, causing the stretch of the continuous film sheet, with the reinforcement cords. Thus, an increase in resistance and the bonding of the cords to the continuous film by elongation is obtained. In the event that the continuous film enters the stretching rollers with the macroperforated windows cut, these windows are lengthened with the material, acquiring their longitudinally elongated oval shape. This motorization or relative movement between both rollers can be carried out with various solutions, such as for example a motor that drives a gear associated with the two rollers to move them with different speeds. In another embodiment, the stretching roller is motorized and the other stretching roller comprises a brake or a motor that forces it to rotate at a lower speed.
En una realización preferente los rodillos de estirado están dispuestos alternados a ambos lados del paso del film continuo y de los cordones de refuerzo en su estirado. De esta forma se consigue una mejor adhesión de los cordones al film continuo.  In a preferred embodiment, the stretching rollers are arranged alternately on both sides of the passage of the continuous film and of the reinforcement cords in their stretching. In this way a better adhesion of the cords to the continuous film is achieved.
Descripción de las figuras. Description of the figures.
Para complementar la descripción que se está realizando y con objeto de facilitar la comprensión de las características de la invención, se acompaña a la presente memoria descriptiva un juego de dibujos en los que, con carácter ilustrativo y no limitativo, se ha representado lo siguiente:  To complement the description that is being made and in order to facilitate the understanding of the characteristics of the invention, a set of drawings is attached to the present specification in which, for illustrative and non-limiting purposes, the following has been represented:
- La figura 1 muestra una vista en planta de la enfardadora con el juego de rodillos de corte en una posición anterior ai juego de rodillos de estirado.  - Figure 1 shows a plan view of the baler with the set of cutting rollers in a position prior to the set of drawing rollers.
- La figura 2 muestra una vista en planta de la enfardadora con el juego de rodillos de corte en una posición posterior al juego de rodillos de estirado.  - Figure 2 shows a plan view of the baler with the set of cutting rollers in a position after the set of drawing rollers.
- La figura 3 muestra un detalle parcial en perspectiva de la conformación de los refuerzos y su unión al film continuo al pasar por unos medios de concentración, en este caso un peine.  - Figure 3 shows a partial perspective detail of the conformation of the reinforcements and their attachment to the continuous film when passing through concentration means, in this case a comb.
- La figura 4 muestra un detalle parcial en perspectiva de la conformación de los las ventanas de macroperforado y el paso del film continuo por los rodillos de estirado para obtener finalmente el film macroperforado.  - Figure 4 shows a partial perspective detail of the conformation of the macroperforated windows and the passage of the continuous film through the drawing rollers to finally obtain the macroperforated film.
- La figura 5 muestra una vista en alzado de la secuencia longitudinal de la circulación del film continuo y de los cordones, observándose como las tiras de film de refuerzo provienen de bobinas independientes sobre el portabobinas adicional. - La figura 6 una vista en alzado de la secuencia longitudinal de una alternativa de realización de la circulación del film continuo y de los cordones, observándose como las tiras de film de refuerzo se obtienen de una bobina e film continuo que pasa por unos medios de corte y separación de dichas tiras de film de refuerzo in situ. - Figure 5 shows an elevation view of the longitudinal sequence of the circulation of the continuous film and the cords, observing how the strips of reinforcing film come from independent coils on the additional bobbin case. - Figure 6 an elevation view of the longitudinal sequence of an alternative embodiment of the circulation of the continuous film and the cords, observing how the strips of reinforcing film are obtained from a continuous film and coil that passes through a means of cutting and separating said strips of reinforcing film in situ.
Realización preferente de la invención Preferred Embodiment of the Invention
Como se puede observar en las figuras referenciadas la enfardadora objeto de esta invención comprende, en una primera realización, una plataforma (14) giratoria para la colocación del palet (P) a enfardar, y una estructura (1) lateral con una columna (15) sobre la que se encuentra un dispensador (2) de dispensación de un film macroperforado (42) de enfardado, estando dicho dispensador (2) posibilitado de movimiento de ascenso y descenso sobre dicha columna (15) de la estructura (1). Adjunta a la estructura (1 ) se encuentra un cuadro (16) de control e instrumentación eléctrica que maneja toda la enfardadora.  As can be seen in the referenced figures, the wrapper object of this invention comprises, in a first embodiment, a rotating platform (14) for placing the pallet (P) to be encased, and a lateral structure (1) with a column (15). ) on which a dispenser (2) for dispensing a macroperforated wrapping film (42) is located, said dispenser (2) being able to move up and down on said column (15) of the structure (1). Attached to the structure (1) is an electrical control and instrumentation panel (16) that handles the entire baler.
El dispensador (2) comprende un portabobinas (3) de un film continuo (4) de plástico, junto al cual se encuentra un portabobinas adicional (8) de film de refuerzo (9), que en la figura 3, está bobinado en varias bobinas independientes (92) dispuestas paralelas sobre dicho portabobinas adicional (8).  The dispenser (2) comprises a bobbin holder (3) of a continuous plastic film (4), next to which is an additional bobbin holder (8) of reinforcing film (9), which in figure 3, is wound in several independent coils (92) arranged parallel on said additional bobbin holder (8).
En una alternativa de realización, representada en la figura 6, el portabobinas adicional (8) comprende una bobina de film continuo (93) que está enfrentada a unos medios de corte (10) para la formación de las tiras de film de refuerzo (9) antes de pasar por los medios de concentración que forman los cordones (91).  In an alternative embodiment, shown in Figure 6, the additional bobbin holder (8) comprises a continuous film reel (93) that faces cutting means (10) for forming the reinforcing film strips (9 ) before going through the concentration means that form the cords (91).
En una realización representada en las figuras 1 a 3, entre ambos portabobinas (3 y 8) se encuentra un peine (11), en posición vertical, de concentración de las tiras del film de refuerzo (9) en cordones (91), para su fijación en una cara del film continuo (4) suministrado por el portabobinas (3) principal.  In an embodiment represented in Figures 1 to 3, between both bobbin holders (3 and 8) there is a comb (11), in vertical position, of concentration of the strips of the reinforcing film (9) in cords (91), for its fixation on one side of the continuous film (4) supplied by the main bobbin holder (3).
Este peine (11 ) está realizado en este caso en nailon, con unas entradas anchas hacia un estrangulamiento de formación del cordón (91). El dispensador (2) presenta un juego de rodillos de corte en el cual entra el film continuo (4) con los cordones (91 ) de refuerzo.  This comb (11) is made in this case in nylon, with wide entrances towards a strangulation of the cord (91). The dispenser (2) has a set of cutting rollers in which the continuous film (4) with the reinforcing cords (91) enters.
Este juego de rodillos de corte comprende un rodillo portador (71) de unas cuchillas (72) longitudinales de corte por calentamiento y un contrarrodillo (73) enfrentado, entre los cuales pasa el film continuo (4) de plástico. Ambos rodillos (71 y 73) comprenden un mecanismo que los hace girar en la dirección de avance del film continuo (4) de plástico de forma sincronizada. This set of cutting rollers comprises a carrier roller (71) of longitudinal cutting blades (72) for heating and a counter roller (73) faced, between which passes the continuous film (4) of plastic. Both rollers (71 and 73) comprise a mechanism that rotates them in the direction of advance of the continuous plastic film (4) in a synchronized manner.
Estas cuchillas (72) están dispuestas longitudinalmente para la formación de unas ventanas (41) en el film continuo (4), y separadas por unos espacios correspondientes a las zonas de paso de los cordones (91) de las tiras de film de refuerzo (9), que no se cortan.  These blades (72) are arranged longitudinally for the formation of windows (41) in the continuous film (4), and separated by spaces corresponding to the passage areas of the cords (91) of the reinforcing film strips ( 9), which are not cut.
A continuación el dispensador (2) presenta un juego de rodillos de estirado (51 y 52), que giran a distintas velocidades para producir un estiramiento del film macroperforado (42) para su aplicación sobre el palet (P) y el ensanchamiento de las ventanas (41) de macroperforado a su forma ovalada.  Next, the dispenser (2) presents a set of stretching rollers (51 and 52), which rotate at different speeds to produce a stretch of the macroperforated film (42) for application on the pallet (P) and the widening of the windows (41) from macroperforated to its oval shape.
El dispensador (2) presenta un rodillo de salida (6) del film macroperforado (42) durante su manipulación.  The dispenser (2) has an exit roller (6) of the macroperforated film (42) during handling.
En la figura 5, se ha representado una realización de la enfardadora, la cual presenta en el recorrido del film continuo (4) primero el juego de rodillos de estirado (51 , 52) y posteriormente el juego de rodillos de corte.  In figure 5, an embodiment of the wrapping machine is shown, which first shows the set of stretch rollers (51, 52) and then the set of cutting rollers in the course of the continuous film (4).
En una realización, los medios de colocación de los cordones (91) sobre el film continuo (4) comprenden el portabobinas adicional (8) y una pluralidad de bobinas independientes (92) de tiras de film de refuerzo (9), dispuestas paralelas, para atacar los medios de concentración, que en este caso están configurados por un rodillo giratorio concentrador (12), donde las tiras de film de refuerzo (9) se convierten en cordones (91). Este rodillo giratorio concentrador (12) gira libremente y presenta unas gargantas perimetrales (13) de sección en "V" para la concentración de respectivas tiras de film de refuerzo (9) a cordones (91). A continuación del rodillo giratorio concentrador (12) se encuentra el portabobinas (3) de la bobina de film continuo (4), y los cordones (91) se aplican en la superficie exterior de esta bobina, acompañando al film continuo (4) en su desbobinado hacia una pareja de rodillos (51 , 52) de estirado.  In one embodiment, the means for placing the cords (91) on the continuous film (4) comprise the additional bobbin holder (8) and a plurality of independent coils (92) of reinforcing film strips (9), arranged parallel, to attack the concentration means, which in this case are configured by a rotating concentrator roller (12), where the strips of reinforcing film (9) become cords (91). This rotating concentrator roller (12) rotates freely and has perimeter throats (13) of "V" section for the concentration of respective strips of reinforcing film (9) to cords (91). Next to the concentrating rotating roller (12) is the bobbin holder (3) of the continuous film coil (4), and the cords (91) are applied on the outer surface of this coil, accompanying the continuous film (4) in its unwinding towards a pair of rollers (51, 52) of stretching.
Esta pareja de rodillos (51 , 52) de estirado comprende una motorización que posibilita que la velocidad tangencial de la superficie del segundo rodillo (52) sea superior a la velocidad tangencial del primer rodillo (51) para producir el estiramiento del film continuo (4) y de los cordones (91) aplicados en su superficie, produciendo su adhesión, mejorando su resistencia y optimizando su utilización por alargamiento general. En la entrada y en la salida de la pareja de rodillos de estirado (51 , 52) se encuentran unos rodillos intermedios (61) de desvío del film macroperforado (42). This pair of stretch rollers (51, 52) comprises a motorization that allows the tangential speed of the surface of the second roller (52) to be greater than the tangential speed of the first roller (51) to produce stretching of the continuous film (4 ) and of the cords (91) applied on its surface, producing its adhesion, improving its resistance and optimizing its use by general elongation. Intermediate rollers (61) for diverting the macroperforated film (42) are located at the entrance and exit of the stretching roller pair (51, 52).
Una vez descrita suficientemente la naturaleza de la invención, así como un ejemplo de realización preferente, se hace constar a los efectos oportunos que los materiales, forma, tamaño y disposición de los elementos descritos podrán ser modificados, siempre y cuando ello no suponga una alteración de las características esenciales de ia invención que se reivindican a continuación.  Once the nature of the invention has been sufficiently described, as well as a preferred embodiment, it is stated for the appropriate purposes that the materials, shape, size and arrangement of the described elements may be modified, provided that this does not imply an alteration. of the essential features of the invention that are claimed below.

Claims

REIVINDICACIONES
1.- Enfardadora, del tipo de las que comprenden una estructura (1) con un dispensador (2) de film posibilitado de giro relativo respecto al palet a enfardar y de desplazamiento vertical respecto a la estructura (1); comprendiendo dicho dispensador un portabobinas (3) para ei posicionamiento de una bobina de film continuo (4) de plástico, un juego de rodillos de estirado (51 , 52) y al menos un rodillo de salida (6) del film continuo (4), caracterizada porque comprende: unos rodillos de de corte para la definición en el film continuo (4), procedente de la bobina, de unas ventanas (41) y la transformación de dicho film continuo (4) en un film macroperforado (42) antes de su aplicación sobre la carga a enfardar; estando configurado dicho juego de rodillos de corte por un rodillo portador (71) de unas cuchillas (72) radiales de corte, dispuestas en planos paralelos, y por un contrarrodillo (73) enfrentado, entre los cuales pasa el film continuo (4) de plástico. 1.- Engradadora, of the type of those that comprise a structure (1) with a film dispenser (2) enabled relative rotation with respect to the pallet to be wrapped and vertical displacement with respect to the structure (1); said dispenser comprising a bobbin holder (3) for the positioning of a continuous film coil (4) of plastic, a set of stretching rollers (51, 52) and at least one exit roller (6) of the continuous film (4) , characterized in that it comprises: cutting rollers for the definition in the continuous film (4), coming from the coil, of some windows (41) and the transformation of said continuous film (4) into a macroperforated film (42) before of its application on the load to be encased; said set of cutting rollers being configured by a carrier roller (71) of radial cutting blades (72), arranged in parallel planes, and by a counter roller (73) facing each other, between which the continuous film (4) of plastic.
2.- Enfardadora, según la reivindicación 1 , caracterizada porque comprende un portabobinas adicional (8) portador de al menos una bobina (92, 93) de film para el suministro de tiras de film de refuerzo (9), y unos medios para la concentración lateral de cada una de las tiras del film de refuerzo (9) y la conformación de respectivos cordones (91) destinados a aplicarse paralelamente y en dirección longitudinal sobre una de las caras del film continuo (4) de modo que dichos cordones (91) queden posicionados entre las ventanas (41) del film macroperforado (42). 2. Engradadora, according to claim 1, characterized in that it comprises an additional bobbin holder (8) carrying at least one coil (92, 93) of film for the supply of reinforcing film strips (9), and means for the lateral concentration of each of the strips of the reinforcing film (9) and the conformation of respective cords (91) intended to be applied in parallel and in a longitudinal direction on one of the faces of the continuous film (4) so that said cords (91 ) are positioned between the windows (41) of the macroperforated film (42).
3.- Enfardadora, según la reivindicación 2, caracterizada porque comprende una bobina (93) de film continuo en el portabobinas adicional (8); y unos medios de corte (10), dispuestos entre el portabobinas adicional (8) y los medios de concentración lateral (11 , 12), para el corte del film continuo de la bobina (93) en tiras de film de refuerzo (9) antes de su paso por los medios de concentración de lateral. 3. An encoder according to claim 2, characterized in that it comprises a reel (93) of continuous film in the additional bobbin holder (8); and cutting means (10), arranged between the additional bobbin holder (8) and the lateral concentration means (11, 12), for cutting the continuous film of the coil (93) into strips of reinforcing film (9) before passing through the lateral concentration means.
4.- Enfardadora, según cualquiera de las reivindicaciones 2 y 3, caracterizada porque los medios de concentración lateral están conformados por un peine (11). 4. Engradadora, according to any of claims 2 and 3, characterized in that the lateral concentration means are formed by a comb (11).
5.- Enfardadora, según cualquiera de las reivindicaciones anteriores, caracterizada porque las cuchillas (72) son cuchillas calefactadas y el contrarrodillo (73) presenta un recubrimiento resistente al calor (75). 5.- Engradadora, according to any of the preceding claims, characterized in that the blades (72) are heated blades and the counter roller (73) has a heat resistant coating (75).
6. - Enfardadora, según cualquiera de las reivindicaciones anteriores, caracterizada porque el juego de rodillos de corte está dispuesto antes del juego de rodillos de estirado (51 , 52). 6. - Engradadora, according to any of the preceding claims, characterized in that the set of cutting rollers is arranged before the set of stretching rollers (51, 52).
7. - Enfardadora, según cualquiera de las reivindicaciones 1 a 5, caracterizada porque el juego de rodillos de corte está dispuesto después del juego de rodillos de estirado (51 , 52). 7. - Engradadora, according to any of claims 1 to 5, characterized in that the cutting roller set is arranged after the stretching roller set (51, 52).
8. - Enfardadora, según cualquiera de las reivindicaciones 2 y 3, caracterizada porque los medios de concentración están compuestos por un rodillo (12) giratorio, dotado con unas gargantas perimetrales (13) de sección en "V", para el paso y concentración de las tiras de film de refuerzo (9). 8. - Engradadora, according to any of claims 2 and 3, characterized in that the concentration means are composed of a rotating roller (12), provided with perimeter throats (13) of section "V", for the passage and concentration of the reinforcing film strips (9).
9. - Enfardadora, según cualquiera de las reivindicaciones anteriores, caracterizada porque los rodillos (51 , 52) de estirado, están dotados de motorización y dispuestos en orden consecutivo, para el paso del film continuo (4) reforzado con los cordones (91), girando la superficie exterior del segundo rodillo (52) de estirado, una velocidad tangencial mayor que la del primer rodillo (51) de estirado, provocando el estiramiento de la lámina de film continuo (4), con los cordones (91) de refuerzo, y obteniendo un aumento de resistencia y su unión. 9. - Engradadora, according to any of the preceding claims, characterized in that the rollers (51, 52) are stretched, are provided with motorization and arranged in consecutive order, for the passage of the continuous film (4) reinforced with the cords (91) , rotating the outer surface of the second stretching roller (52), a tangential speed greater than that of the first stretching roller (51), causing the continuous film sheet to be stretched (4), with the reinforcing cords (91) , and obtaining an increase of resistance and its union.
10.- Enfardadora, según la reivindicación 7, caracterizada porque los rodillos (51 , 52) de estirado están dispuestos alternados a ambos lados del paso del film continuo (4) y de los cordones (91) de refuerzo en su estirado. 10.- Engradadora, according to claim 7, characterized in that the stretching rollers (51, 52) are arranged alternately on both sides of the passage of the continuous film (4) and of the reinforcing cords (91) in their stretching.
PCT/ES2011/000215 2010-06-29 2011-06-29 Wrapping machine WO2012001185A1 (en)

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ES201130367A ES2362846B1 (en) 2011-03-16 2011-03-16 DEVICE FOR REINFORCEMENT AND SUPPLY OF PLASTIC FILM.

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ES1014357U (en) * 1990-06-08 1991-03-16 Serpack, S.A. Baler with prestirado device for packaging band. (Machine-translation by Google Translate, not legally binding)
EP0638505A1 (en) * 1993-08-09 1995-02-15 Mima Incorporated An apparatus and method for hemming edges of stretch film and a film having hemmed edges
US20050123721A1 (en) * 2000-02-18 2005-06-09 Gerd Heikaus Stretch film and method for producing a stretch film
WO2002094674A1 (en) * 2001-05-23 2002-11-28 Akro-Flex S.A.S. Di Garegnani Antonio & C. Process and apparatus for the production of a reinforced wrapping film with localized weakened zones

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014152126A1 (en) * 2013-03-15 2014-09-25 Davis-Standard, Llc Apparatus for manufacturing and processing films
US9162403B2 (en) 2013-03-15 2015-10-20 Davis-Standard, Llc Apparatus for manufacturing and processing pre-stretch films having strips of increased thickness
CN114341006A (en) * 2019-07-02 2022-04-12 Aaa包装用品私人有限公司 Apparatus, system and method for slitting film material

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